Exhaust ventilator



Aug. 7, 1934- EY l.. FORD -r AL 1,968,936

4 EXHAUST VENTILATOR Filed Dec. 5, 1929 Patented ug. 7, 1934 measles Y Exim-osu: WENT-Imran Jnimeerlamiera roraandnieliara James new, f Darlington, England applicati@ Deember 1.5, 1929., Serial Nn..4`ii,91a l fnGreatlBritainDecember 14, 15128 This` 'invention relates to automatic, exhaust 'ventilators =for ithe ifolosed compantrnents` or :bodies dfwehiciles, :and in` particular `teggthat for-ni fof ventilator :described `.andielairned 'in riited States i Specification fNQ. V1,.i.f2,;'592 issueditofone of uspand it'hasifor `itsioln'ectia construction which iis-highly efcientiatiallespeedsat which `the vehicle may be moving `which has no 'moving or ,loose parts,

liable to :getrout offerid-error lostand which has a i'presentable appearance. i

The present iinvention relateszmore particularly to improvementsnithe fconstruction'of .the .exterioriparts. of the 'ventilator andthe yconstruction of the interior @is-substantially the same :as that describedl and :illustrated :in the .aforesaid ,prior patent. 5

The ecb-j ect tof this Vinvention is attained :by `fthe construction shown fin the accompanying .drawing Whichs fEigures'LZ and Sere viewsein sideaelevation,

end helevation and plan respectivelyland,

sides -Zifare ftwogapertures 4 and .Jthezapertures 3'5"; deflectors tandas?? horizontally or approxi- "QJL the inner edge of the slot 10 ineach deiiector Figureiis asectionwoniline -f-:raoffFigure i l Thefhollow body'l "which forms the exhaust chambertis .of 'lozengershapezandrhasfboth .itsi'sides 2 Landzits `-topeof -convex form. In eaohof :the

4 Abeing :approximate to `one tend .oi the =body and those .f5 i being--approximateftoftherotheraend .thereof. These 'apertures arelapproximately 'M4-shaped with their apices towards :the vends :of ;the body.

'Gnueach sidefo'f `thebody areItwo exterior plates formingfzdeflectors l6 .Land '.7 which :are :preferably inclined or ourvediso :asito `coincidefor register with the edges of the apertures Il and 5 nearest to .thefliendsrofithe lbody. the tops of the mately horizontally disposed plates 8 which extend towards the centre of the body and preferably taper towards said point. The plates 8 are provided with apertures 9 which operate to intensify the negative pressure at the apertures 4 or 5 by reason oi the flow oi air over said openings. In each of the main deilectors 6 and 'l is a slot l which is located approximately in the centre of said defiector. The inner edge of each ""slot lies in substantially parallel relation to the side wall of the body 2 to which the inner edge of the deilector is attached, and the outer edge of the slot lies in substantially parallel relation The (central ipart :of `:the base yiis'ifomned by fitwo f inclined plates l2 which fslopezupwardly'etowards one :another iso Lto form by fand ribetwe'en `:them a-'relatively 'narrow .centrally a-arafan'ged transverse' aperture E18. The Rapper edges 'fof the @plates .11;2 which `iorm `the con-unas sof lthe aperture 13 vare preferably isnaped tov *form Jupwardly curved :lips 14. .Located between athe @plates 1=2and the itop i3 are fa :series )of vertically .disposed iplates d'5, fsaid plates :being angular-ly arranged awith .zrespectflto the longitudinal centrefofltheiapparatus. i

The "action `:of the :ventilator is :.as follows :w-

Assumingithat .theyehicla to itherloody ofiwhich the :apparatus is oitted, 1is zinzgmotioniin ithe .direef tioniof :the arrow-Figure I-aowrofiair Willlbe set @up "over ithe ybody lof ithe aventilator. 'dif fthe speed of the Avehicle iis slow the air :stream when itstrikes tthe iorwardimain deiiectors 6 fwillin part zpassthizough lthexslots iwhchincreases the negative 4pressure f at the :forward iside :apertures 4 lin'rthe .tbody gef Ithe yentilator, and iin lpartow outwards `foyer the :outer ledges ,of said defie'ct'ors. The air :streamathen 'impinges oncto ithere'ar imain deflectors .'7 when :the auxiliary `{deflectors .lil will assist inigatheringthe iiowy of theairistreamiinto the apertures fof :the tbody, thereby creating fa positive 'pressure :on ithe irear iside l:of i the '..oentral extraction-aperture r3 avithintheibody Ianilzthereby :assist lin the formation Lofa znegative ipressurev at fsaid @aperture As .the aa'ir ilow increases the streams passing :through 'the :.slots` 10 :in 2the :for- Wardunain :deflectorsi sare, rhy xtlfie :action of auxiliary :.deiiectors 11 ithereon, itlirown .riurtner out fromthe bodyioff-the'nentilator, andisuchiof them-as meetthe rear-:defleotors'lescape through the-slots minzsaid iieilecitors,thusaeliminatianyA baffling action until such times as the speed of the air ilow increases to an extent which causes the air ilow through the slots 10 to flow further outwards until it meets the other air stream and passes over the edges of said main deflectors to merge with it and pass to the rear clear of the main deflectors 'l thus simultaneously setting up negative pressure at the side apertures 4 and 5 in the body 3.

What we claim is:-

il. An exhaust ventilator comprising a chamber which consists of a base having a transversely arranged opening at the centre of its length, a top and a pair of converging side walls having openings located in opposed pairs near the ends of the chamber, plates forming exterior deectors on the `side Walls of said chamber adjacent to said side openings, an aperture formed in each exterior deilector, an approximately horizontally disposed Gil apertured extension oi' the exterior deflectors, and a plurality of vertically and angularly disposed defiector plates located within said chamber on each side of the transverse aperture in the base.

2. An exhaust ventilator comprising a chamber which consists of a base having a transversely arranged opening at the centre of its length, a top and a pair of converging side walls having openings located in opposed pairs near the ends of the chamber, plates forming exterior delectors on located transverse opening, a top and sides connecting said top and said base which converge towards each other and in which are angularlyshaped apertures which are located in opposed pairs near the ends of the chamber, inclined yplates on the side walls of said body forming exterior deectors. which register with the upper edges of said angularly-shaped apertures, an aperture formed in each exterior delector, an auxiliary deflector applied to each exterior delector springing from the inner edge of said aperture and extending outwards towards the centre of the length of the ventilator, and a plurality of vertically and angularly disposed deilector plates located within said chamber on each ,y side of the transverse aperture in the base.

4. In combination in an exhaust ventilator comprising a lozenge-shaped chamber comprising a base which slopes upwardly towards the centre and has a centrally located transverse opening, a

top, and side walls extending between said base and said top and having angularly-shaped apertures which are located in opposed pairs near the ends of the chamber, inclined plates forming exterior deiiectors on the side walls of said chamber which register with the edges of said apertures nearest to the ends of the chamber, an aperture formed in each of said inclined plates, an approximately horizontally disposed apertured extension of the exterior deflectors, an auxiliary delector applied to each exterior deflector springing from the inner edge of said aperture and extending outwards towards the centre of the length of the ventilator, and a plurality of vertically and angularly arranged plates located in proximity to the two edges of the central aperture in the base of the chamber which operate as interior deiiectors.

5. A double-ended symmetrical exhaust ventilator comprising a base sloping upwards towards the centre of its length and having a relatively narrow transversely arranged opening at said centre, a top above said base, a pair of forwardly converging side walls and a pair of rearwardly converging side walls between said base and said top and having angular openings, the edges of which nearest to the ends of the ventilator slope upwards and backwards from the base to the top, a pair of forwardly and a pair of rearwardly inclined plates on the exterior of the side walls which register with the sloping edges of the openings in said side walls, an aperture formed in each of the forwardly and rearwardly inclined plates, an auxiliary plate springing from the inner edge of the aperture in each of said inclined plates and disposed approximately parallel with the converging side walls, and a plurality of deflector plates in the interior of the ventilator on each side of the central opening in the base and extending vertically from the base to the top.

6. A double-ended symmetrical exhaust ventilator comprising a base which slopes upwards towards the centre of its length and has a relatively narrow transversely arranged opening at said centre, a top above said base, a pair of forwardly converging side walls and a pair of rearwardly converging side walls between said base and said top and having angular openings, the edges of which, nearest to the ends of the ventilator, slope upwards and backwards from the base to the top7 a pair of forwardly md a pair of rearwardly inclined plates on the exterior of the side walls which register with the sloping edges of the openings in said side walls, horizontally disposed apertured extensions of said inclined plates at their upper ends, an aperture formed in each of the forwardly and rearwardly inclined plates, an auxiliary plate springing from the inner edge of the aperture in each of said inclined plates and disposed approximately parallel with the converging side walls, and a plurality of angularly arranged vertical plates extending from the base to the top and located in proximity to the two edges of the central transverse aperture in the base of the chamber which operate as interior deflectors.

ERNEST LEONARD FORD. RICHARD JAMES REW. 

